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Regular Expression Solutions to Common Problems

Jul 14, 2008

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This chapter is from the book 

Sams Teach Yourself Regular Expressions in 10 Minutes

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HTML Comments

Comments in HTML pages are placed between  tags (use at least two hyphens, although more are allowed). Being able to locate all comments is useful when browsing (and debugging) Web pages.

<!-- Start of page -->
<HTML>
<!-- Start of head -->
<HEAD>
<TITLE>My Title</TITLE> <!-- Page title -->
</HEAD>
<!-- Body -->
<BODY>

<!-{ 2,} .*?-{ 2,} >

<!-- Start of page -->
<HTML>
<!-- Start of head -->
<HEAD>
<TITLE>My Title</TITLE> <!-- Page title -->
</HEAD>
<!-- Body -->
<BODY>

<!-{ 2,} matches the start of the comment, <! followed by two or more hyphens. .*? matches the comment body (not greedy). -{ 2,} > matches the end of the comment.

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